Ultrashort Pulse Laser Ablation of Bulk Materials Using Shaped Laser Beams

Ultrashort Pulse Laser Ablation of Bulk Materials Using Shaped Laser Beams
Author: Dmitriy Mikhaylov
Publisher: Cuvillier Verlag
Total Pages: 176
Release: 2021-06-24
Genre: Technology & Engineering
ISBN: 3736964463
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High precision, high quality, and high throughput of ultrashort pulse laser ablation of bulk material are the most demanded properties that are required to let this process technology compete with other micro-machining techniques. Previous attempts to increase volumetric ablation rates of ultrashort pulse laser processes were based on the increase of fluence or pulse repetition rates. They run into limitations mainly set by the occurrence of bumpy surfaces due to overheating of bulk material. In this work, the potential of laser beam shaping for the enhancement of ablation rates is studied systematically for the first time. The question regarding the physically shortest possible process time for ablation of 2.5D-structures by means of an ultrashort pulse laser is answered using a heat conduction model, which is extended by the ability to consider spatially shaped beams. The strategy of laser beam stamping is implemented in a novel optical setup and proven both theoretically and experimentally to have a great potential for increasing ablation rates.

Pulsed Laser Processing of Materials

Pulsed Laser Processing of Materials
Author: Dongfang Yang
Publisher: BoD – Books on Demand
Total Pages: 196
Release: 2024-07-17
Genre: Science
ISBN: 0854666117
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The processing and analyzing of materials by short laser pulses demonstrates a significant scientific, technological, and industrial potential that has been revealed largely over the last decade. This book presents seven chapters of literature reviews written by experts from the international scientific community. It covers recent advances in laser ablation technologies for producing Li-ion battery materials and components; pulsed laser deposition of ferroelectric materials; fundamentals of ultra-short pulse laser interaction with metals, semiconductors, or dielectrics; synthesis of nanoparticles in liquid of a variety of materials by laser ablation; processing of biological tissues and materials by ultrashort-pulse burst-mode laser; gemstone identification using laser-induced Raman spectroscopy, photoluminescence, and photoluminescence lifetime analysis and machine learning for reliable quantitative elemental analysis of materials from LIBS spectral data.

Ultrafast Laser Nanostructuring

Ultrafast Laser Nanostructuring
Author: Razvan Stoian
Publisher: Springer Nature
Total Pages: 1243
Release: 2023-04-06
Genre: Science
ISBN: 3031147529
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Bringing together contributions from leading experts in the field, this book reviews laser processing concepts that allow the structuring of material beyond optical limits, and methods that facilitate direct observation of the underlying mechanisms by exploring direct structuring and self-organization phenomena. The capacity to nanostructure material using ultrafast lasers lays the groundwork for the next generation of flexible and precise material processing tools. Rapid access to scales of 100 nm and below in two and three dimensions becomes a factor of paramount importance to engineer materials and to design innovative functions. To reflect the dynamic nature of the field at all levels from basic science to applications, the book is divided into three parts, Fundamental Processes, Concepts of Extreme Nanostructuring, and Applications, each of which is comprehensively covered. This book will be a useful resource for graduate students and researchers in laser processing, materials engineering, and nanoscience.

Artificial Intelligence in Label-free Microscopy

Artificial Intelligence in Label-free Microscopy
Author: Ata Mahjoubfar
Publisher: Springer
Total Pages: 151
Release: 2017-04-19
Genre: Technology & Engineering
ISBN: 3319514482
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This book introduces time-stretch quantitative phase imaging (TS-QPI), a high-throughput label-free imaging flow cytometer developed for big data acquisition and analysis in phenotypic screening. TS-QPI is able to capture quantitative optical phase and intensity images simultaneously, enabling high-content cell analysis, cancer diagnostics, personalized genomics, and drug development. The authors also demonstrate a complete machine learning pipeline that performs optical phase measurement, image processing, feature extraction, and classification, enabling high-throughput quantitative imaging that achieves record high accuracy in label -free cellular phenotypic screening and opens up a new path to data-driven diagnosis.

Femtosecond Laser Micromachining

Femtosecond Laser Micromachining
Author: Roberto Osellame
Publisher: Springer Science & Business Media
Total Pages: 485
Release: 2012-03-05
Genre: Science
ISBN: 364223366X
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Femtosecond laser micromachining of transparent material is a powerful and versatile technology. In fact, it can be applied to several materials. It is a maskless technology that allows rapid device prototyping, has intrinsic three-dimensional capabilities and can produce both photonic and microfluidic devices. For these reasons it is ideally suited for the fabrication of complex microsystems with unprecedented functionalities. The book is mainly focused on micromachining of transparent materials which, due to the nonlinear absorption mechanism of ultrashort pulses, allows unique three-dimensional capabilities and can be exploited for the fabrication of complex microsystems with unprecedented functionalities.This book presents an overview of the state of the art of this rapidly emerging topic with contributions from leading experts in the field, ranging from principles of nonlinear material modification to fabrication techniques and applications to photonics and optofluidics.

State-of-the-Art of Quantum Dot System Fabrications

State-of-the-Art of Quantum Dot System Fabrications
Author: Ameenah Al-Ahmadi
Publisher: BoD – Books on Demand
Total Pages: 186
Release: 2012-06-13
Genre: Science
ISBN: 953510649X
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The book "State-of-the-art of Quantum Dot System Fabrications" contains ten chapters and devotes to some of quantum dot system fabrication methods that considered the dependence of shape, size and composition parameters on growth methods and conditions such as temperature, strain and deposition rates. This is a collaborative book sharing and providing fundamental research such as the one conducted in Physics, Chemistry, Material Science, with a base text that could serve as a reference in research by presenting up-to-date research work on the field of quantum dot systems.